Properties On Aramid 1313 Fabric And The Compound Silastic Rubber Composite Material With This Fabric

Rubber is elastomer of high molecular compound with high elasticity. Rubber is easy to deform under the action of forces due to its high elaseicity and low elastic module. Accordingly, many rubber products exist in composite form. The rubber composite material, which is used in high temperature environment, not only requiers its excellent mechanical properties, but also has excellent thermal properties. The properties of this composite material are associated with the property of skeleton material such as fabrics and the compound technology such as the hot-forming.(1) The properties of polyester and aramid 1313 plain woven fabric which are usually used for skeleton material of rubber composite are researched by experiment, the area density of this two kinds of fabrics which have the same organization, similar linear density and fabric density are 115.41g/m2 and 120.45g/m2. The moisture regain of aramid 1313 is much larger than polyester yarn, and the polyester yarn has high strength, low elongation and major dry heat shrinkage. The aramid 1313 fabric has lower strength and larger elongation than polyester, but its heat resistance and dimensional stability are significantly better than polyester fabric. Therefore, the research about mechanical property of aramid 1313 fabric is useful for the development of rubber composite reasonable and economic.(2) Aramid 1313 plain-woven fabric has superior thermal porperties, but low strength and high price. The optimal design of fabrics, which have different linear density, were studied to research the relationship between the strength of yarn, fabric density and fabric tensile strength, tear strength.①Fabric tensile strength can be predicted, according to this formule, y = 3 .66x1 +73.34x2?574.32.②The aramid 1313 fabric, which is used for foundtion of rubber composite is usually thin density fabric, there is yarn slipped, gathered and so on between the tearing.The hot-forming technology of composite material is associated with temperature, pressure and time. Three levels which are the greatest impacts of tensile property of aramid 1313 fabric/silastic rubber, were found by single factor test. The values as follows: Temperature are 140, 145, 150℃; Pressure are 10, 12.5, 15Mpa; Time are 15, 20, 25 min. Then, orthogonal test is used to explore the hot-forming technology influence mechanical property of aramid 1313 fabric/silastic rubber composite material.①Temperature, time, pressure have remarkable influence on the tensile strength of aramid 1313 fabric/rubber composite material. The greatest impact is temperature, time is the second, the least is pressure; Temperature, time, pressure has remarkable influence on the tearing strength of aramid 1313 fabric/rubber composite material. The greatest impact is pressure, time is the second, the least is temperature; the influence between hot-forming process and peel strength of aramid 1313 fabric/rubber composite material is not obvious.②The optimized technological parameter of hot-forming are pressure of 10Mpa, temperature of 150℃, time of 15min. The tensile strength of aramid 1313 fabric/silastic rubber composite material made by optimized hot-forming technological parameter is 19.92 Mpa, tear strength of that is 80.71N/5cm, peel strength of that is 33.52N/5cm.